body {
    margin: 0;
    padding: 0;
    background-color: #FAFAFA;
    font: 12pt "Tahoma";
}
* {
    box-sizing: border-box;
    -moz-box-sizing: border-box;
}
.page {
    width: 21cm;
    min-height: 29.7cm;
    padding: 2cm;
    margin: 1cm auto;
    border: 10px #79EB9B solid;
    border-radius: 5px;
    background: white;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
}
.subpage {
    padding: 1cm;
    border: 1px black solid;
    height: 256mm;
    outline: 2cm #6DBA16 solid;
}

@page {
    size: letter;
    margin: 0;
}
@media print {
    .page {
        margin: 0;
        border: initial;
        border-radius: initial;
        width: initial;
        min-height: initial;
        box-shadow: initial;
        background: initial;
        page-break-after: always;
    }
}